diff --git a/discord_rss_bot/main.py b/discord_rss_bot/main.py
index e951361..70f047f 100644
--- a/discord_rss_bot/main.py
+++ b/discord_rss_bot/main.py
@@ -72,6 +72,8 @@ async def add_webhook(webhook_name=Form(), webhook_url=Form()):
         # Add our new list of webhooks to the database.
         reader.set_tag((), "webhooks", webhooks)  # type: ignore
 
+        add_missing_tags(reader)
+
         return RedirectResponse(url="/", status_code=303)
 
     # TODO: Show this error on the page.
diff --git a/tests/test_feeds.py b/tests/test_feeds.py
index c26cdae..214410b 100644
--- a/tests/test_feeds.py
+++ b/tests/test_feeds.py
@@ -6,6 +6,7 @@ import pytest
 from reader import Feed, Reader, make_reader  # type: ignore
 
 from discord_rss_bot.feeds import send_to_discord
+from discord_rss_bot.missing_tags import add_missing_tags
 
 
 def test_send_to_discord() -> None:
@@ -22,6 +23,8 @@ def test_send_to_discord() -> None:
         # Add a feed to the reader.
         reader.add_feed("https://www.reddit.com/r/Python/.rss")
 
+        add_missing_tags(reader)
+
         # Update the feed to get the entries.
         reader.update_feeds()